Ethnic conflict in Ethiopia stretches back to the country’s imperial history. Competing nationalisms begin to emerge towards the end of the imperial era, but were formalized by the Ethiopian People’s Revolutionary Democratic Front (EPRDF) from the 1990s onwards. Under the EPRDF, ethnicity and language classifications formed the main organizing principles for political parties and organizations, and the country’s new federal arrangement was also designed along ethnic fault lines. This book argues that this ethnic federal arrangement, and the continuation of an elite political culture are major factors in explaining the continuation of authoritarianism in Ethiopia. Focusing largely on the last 27 years under the EPRDF and on the political changes of the last few years, but also stretching back to historical narratives of ethnic grievances and division, this book is an important guide to the ethnic politics of Ethiopia and will be of interest to researchers of African politics, authoritarianism and ethnic conflict.